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The 'whirring' sound from the blower motor could be a dry bearing or damaged armature (part of blower motor that the brushes ride on), or just wore brushes. The smell could be the motor winding wires burning due to blower motor bogging down and overheating. You can replace blower motor with new or salvaged one.

I had the same problem with my, 03, hemi. I did not wait 15 min. turn off and back on was all that was needed to reset, "red flashing light lower right hand ". though another 8 or 9 on off's, Engin Light also goes off, untill next time. All i did was pulled off my Air Intake box and hose, so i could get to butterfly on throttle bodie, sprayed carb cleaner in there. and it was very dirty. after put back togather, give it a few.... mine did not start right up, when it did idle real ruff even died few times...Once the computer re adjusted ran like it did when i bought it....that was 2 weeks ago, still no eng light, no flashing red ones either.

Check the charging system,it needs to be 13.65 volts to14.25 volts output at the battery,with the ac/heat on high blower,and the headlights on,if it is lower than tis,then the alternator needs replacing.

This could also be a loose/poor connection from the control unit. I have had a similar issue. I know it is not thermal overload because sometimes the blower just doesn't come on when you start the car. A slap to the top of the dash board over the temperatures controls has got it going again.

as odd as this may sound its a power (electrical) problem check the battery the alternator and the cable coming off of the alternator my car does this when there is not enough current to (something?) lol.... so check all those thigs and report back